5"/6" lowered, Tyre size ?

[Dibdob62]

I have fitted a static 5"/ 6" lowering kit to my 77 C15 and Im now have clearance issues on the front with the 275/60/15 tyres fitted at the moment. What size tyres are you guys using with this much lowering ?

[PGSigns]

What wheels are you running?
Jimmy

[Dibdob62]

Originally Posted by PGSigns

What wheels are you running?
Jimmy

15" Rallies think they are 8" wide

[blazer2007]

I run a 235/70 15 on a 7 inch rim and a 255/70 15 on a 8 inch rally and no troubles. I wish they made a 245 thou, the back is a little tall

[SCOTI]

Originally Posted by Dibdob62

I have fitted a static 5"/ 6" lowering kit to my 77 C15 and Im now have clearance issues on the front with the 275/60/15 tyres fitted at the moment. What size tyres are you guys using with this much lowering ?

275/60-15 = 27.99" tall for your front tires.

This is the mathematical calculation but sizes can/do vary per manufacturer. That being said, blazer2007's combo doesn't help unless the clearance issue is caused by width/back spacing vs. height:

235/70-15 = 27.95" for his front tires.

To recommend a solution, more info is required. Where is the 'clearance issue'?

[Dibdob62]

Its rubbing the inner wheel tub and catching the wheel arch.

Been looking at 235/60/15, 26.10" high and 9.30 wide or 225/60/15 25.60 high and 8.90 wide but would like to know what you guys recommend ?

[SCOTI]

Originally Posted by Dibdob62

Its rubbing the inner wheel tub and catching the wheel arch.

Been looking at 235/60/15, 26.10" high and 9.30 wide or 225/60/15 25.60 high and 8.90 wide but would like to know what you guys recommend ?

Still plan on the same wheel @ 8" wide? If so, 255/60 @ 27" tall is a common front side for 4 or 5" drops.
There's always the aftermarket inner wheel tubs to (like Slosh Tubz).

[blazer2007]

8 in. rims are too wide, I could,t make them work up fr. went to a 7 in.

[SCOTI]

Back spacing, diameter, & overall OD of the tire all play a role. An 8" wheel can fit w/no issues @ 5" of front drop & stock inner wheel wells...

[Dibdob62]

Originally Posted by SCOTI

Back spacing, diameter, & overall OD of the tire all play a role. An 8" wheel can fit w/no issues @ 5" of front drop & stock inner wheel wells...

Is that a 255/60/15 on the front then ?

[SCOTI]

Originally Posted by Dibdob62

Is that a 255/60/15 on the front then ?

In the pic? No.
It's a 245/45-18 @ 26.75" OD on an 18x8" wheel w/5.25" of back spacing.

A 245/60-15 @ 26.57" on your listed 8" wheel size would be another option that's slightly shorter than the 255/60-15 I recommended above.

Also..... How is it lowered? Soft spring rates can contribute to buzzing on the tops of the inner wheel wells. Back-spacing can have an impact as well.
Your 8" Truck Ralleys should work but you need the right height of tire & the right spring rate/shock combo to live a quiet life.

[Dibdob62]

Originally Posted by SCOTI

In the pic? No.
It's a 245/45-18 @ 26.75" OD on an 18x8" wheel w/5.25" of back spacing.

A 245/60-15 @ 26.57" on your listed 8" wheel size would be another option that's slightly shorter than the 255/60-15 I recommended above.

Also..... How is it lowered? Soft spring rates can contribute to buzzing on the tops of the inner wheel wells. Back-spacing can have an impact as well.
Your 8" Truck Ralleys should work but you need the right height of tire & the right spring rate/shock combo to live a quiet life.

3" lowered spindles, 1" lowering springs. Going to put new bump stops back on to stop it hitting the wheel tub for now until I can source some reasonably priced tyres but still not sure about what size to go for, don't want to go to small so most lightly go for the 255/60/15.

[4u2nv]

Originally Posted by SCOTI

Back spacing, diameter, & overall OD of the tire all play a role. An 8" wheel can fit w/no issues @ 5" of front drop & stock inner wheel wells...

Whats your rear setup on that Scoti ????

[SCOTI]

Originally Posted by 4u2nv

Whats your rear setup on that Scoti ????

That 74 had a Western Chassis flip-kit, WC C-notches, lower shock extension brackets, & Bell Tech shackles. Later in its history, a driveway fabricated AOL set-up added.

[Hammered 77]

Scoti, what's the difference between the HD small block spring and the 454 spring?

Rick

[blazer2007]

He mentioned it was a 15 x8 inch rally is what I was talking about. The 235/70 offers a taller tire for clearance on a static drop but clears the inner wheel wells on a 7 inch rim. I,ve tried a 60,s profile but with crappy roads and summer construction it is to low on the A-arm . Embarrassing when you have to use a 2x4 to get over a cut out asphalt.

[SCOTI]

Originally Posted by blazer2007

He mentioned it was a 15 x8 inch rally is what I was talking about. The 235/70 offers a taller tire for clearance on a static drop but clears the inner wheel wells on a 7 inch rim. I,ve tried a 60,s profile but with crappy roads and summer construction it is to low on the A-arm . Embarrassing when you have to use a 2x4 to get over a cut out asphalt.

Understood & all good. I just wanted to educate others to understand there are multiple factors to consider. While switching to 15x7's worked in your application, just doing that may not work for someone else. This is especially true when it comes to where & when rubbing occurs.

[Wantavant]

I have 3" drop springs and 3" drop spindles up front on my 86 C10. I am running 8" rallies with 255/60 up front and 275/60 in rear, no rubbing anywhere. Your truck looks so clean man!

[Dibdob62]

255/60/15 front tyres and it looks like its not catching anymore I also swapped the -1" springs for -2" springs because the ride was the same on both but the -2" springs were stiffer plus I have made up some bump stops giving me some movement now.


Next up I need to lower the rear a bit (hard to see in this picture but there's a good rake) to level it out so I have some 1"/2" drop shackles on there way.